Full list of all 46 Skylanders Trap Team achievements worth 1,000 gamerscore. It takes around 20-25 hours to unlock all of the achievements on Xbox 360.
Complete Story Mode on the Nightmare difficulty setting
Capture 10 Villains
Chapter 18: Collect 9 coins while falling down the Machine Heart
Chapter 14: Complete the arena battle without getting hit by rocket exhaust
Chapter 12: Destroy 5 Da Pinchy statues
Complete a captured Villain's quest
Earn 50 Stars in Kaos Mode
Defeat 100 enemies in Kaos Mode
Complete all Arena levels
Unlock Brock's special arena
Complete Story Mode on any difficulty setting
Complete Chapter 18
Level up any Skylander to level 20
Complete Chapter 17
Chapter 17: Complete all the tile floor puzzles without falling
Complete Chapter 16
Chapter 16: Destroy 10 cacti
Complete Chapter 15
Chapter 15: Shoot down 30 Air Pirates without using rockets
Complete Chapter 14
Complete Chapter 13
Chapter 13: Take down every shield unit during the flying sequence
Complete Chapter 12
Complete Chapter 11
Chapter 11: Ride the train to the end of the line
Complete Chapter 10
Chapter 10: Travel to Splash Station without taking any damage from goo
Collect 20 Skystones
Complete Chapter 9
Chapter 9: Shoot 20 Evilikin Runner during the flying sequence
Achieve Portal Master Rank 5
Complete Chapter 8
Chapter 8: Knock 12 Golden Balls off the waterfall in the Meditative Pool area
Complete Chapter 7
Chapter 7: Collect 20 coins while following Marsha through the mist
Complete Chapter 6
Chapter 6: Destroy 4 stacks of pipes using the crane on Dredger’s Yacht
Complete Chapter 5
Chapter 5: Destroy 8 Troll Transports during the flying sequence
Complete Chapter 4
Chapter 4: Destroy 1 Dropship
Complete Chapter 3
Chapter 3: Destroy 4 stone Chompy heads
Complete Chapter 2
Complete Chapter 1
Unlock your first Elemental area